I finally ran across this one on a customer's system today.
Everything was locked down. I used an XP live CD to boot and went to Windows/System32 folder and organized files according to date. Since the system locks down, the last files are the ones that are likely infected. I went through and renamed all of the files that were at the bottom, and created at the same time. Google is your friend here. There were about 9 files created at the same time listed. A reboot got me to an actual desktop. MBAM still wouldn't install. Online I went to ESET's site and ran their online scanner. That cleaned it enough to run MBAM. MBAM found 1421 infected files. Installed customer's Norton Internet security 2010 and all is well.
I do have to go back and check to see if safe mode will work. Safe mode would run, bluescreen momentarily and reboot.
EDIT: I would have normally pulled the hard drive and scanned it via a USB adapter, but this system is an oddball Sony all in one desktop that is a pain to take apart.
Edited by dpunisher, 08 December 2009 - 09:48 PM.
I am a retired Ford tech. Next to Fords, any computer is a piece of cake. (The cake, its not a lie)
3770K @4.5, Corsair H100, GTX780, 16gig Samsung, Obsidian 700 (yes there is a 700)